Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest oi the applicant or owner in accordance with the Notice of Dec.16, 1969, 869 0.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification. including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofiice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED MAY 19, 1970 T87 4,010 SUPERSENSITIZED SILVER HALIDE PHOTOGRAPHIC EMULSIONS Cynthia G. Ulbing, Fairport, and Mary Jane W. Brizee,fitgssftgrd, N.Y. (both of Kodak Park, Rochester, N.Y.

Filed Dec. 12, 1969, Ser. No. 884,746 Int. Cl. G030 1/28 US. Cl. 96-104No Drawing. 18 Pages Specification Photographic silver halide emulsionscontaining a sensitizing dye combination comprising (1) abenzimidazolooxacarbocyanine dye and (2) abenzimidazoloselenacarbocyanine dye which extends the sensitivity of theemulsion into the minus blue region of the spectrum. Preferred dyecombinations include those represented by (l) a dye having the formula:

R: Hm I 0\ l \e/ N N R7 l t: X1 I la and (2) a dye having the formula:

R12 Bit I I wherein n, m, k and p each represents a positive integer offrom 1 to 2; R R R and R each represents an alkyl group; R and R eachrepresents an unsubstituted lower alkyl p; 7 8, 9, 10 11 12 13 and 14each represents a member selected from the group consisting of ahydrogen atom and a halogen atom; X and X each represents an acid anion;V and Z each represents a member selected from the group consisting of ahydrogen atom, a halogen atom, an alkyl group, an alkoxy group and anaryl group; L L L and L each represents a methine linkage; and W and Yeach represents a member selected from the group consisting of ahydrogen atom, a halogen atom, a cyano group, an unsubstituted alkylgroup, an alkoxy group, an acyl group of a monobasic fatty acid, analkylaminocarbonyl group, a trifluoroalkyl group and atrifluoroalkylsulfonyl group.

